The southern side of Point Roadknight is the ocean face of Anglesea's protective headland, a reef of low limestone blocks and sandy channels that runs 500 m east from the point and takes the south-westerly swell so that Anglesea Bay behind it can be calm. As a dive it is the wilder twin of the northern side. The Scuba Doctor describes a mixture of low limestone blocs and sandy channels and limestone reefs with plenty of marine life in the nooks and crannies, in 1-9 m, and the picture is of a maze rather than a wall: blocks of dune limestone the size of cars scattered across sand, each undercut and holed, with channels of clean sand between them and crayweed and bull kelp on their tops.

The nooks and crannies hold southern rock lobster, Port Jackson sharks, blue devils in the deeper holes, octopus and cuttlefish, and the shaded faces are covered in sponges, ascidians and bryozoans; the fish are blue-throat wrasse, magpie perch, leatherjackets, scalyfin, zebrafish, old wives, sweep and boarfish, with weedy seadragons along the weed edges and rays in the sandy channels. It is the more exposed of the two Roadknight dives by a wide margin. The beach to the west has a double bar system with rips every 400 m, permanent rips run off the point, and the reef is awash in any swell, so it is strictly a flat-day, offshore-wind, experienced-diver site, and the Scuba Doctor's phrase, highly hazardous area dominated by strong rips, should be taken at face value.

On the right day the shelf entry is easy, the water is clear and the blocks are an absorbing place to hunt for crays and cuttlefish. The shared car park at Melba Parade and Eighth Avenue makes it simple to check both sides and dive whichever the sea allows.

From Anglesea follow the Great Ocean Road south-west and turn onto Eighth Avenue to the car park at the intersection of Melba Parade and Eighth Avenue, which serves both sides of the point (free). Gear up, walk down the ramp to the beach (about 100 m), then out onto the rock shelf and as far east as you want before entering from its edge. Exit on the same shelf.

Beach marker 96W identifies the spot. The northern side, with the boat ramp and yacht club, is documented separately.

Very calm conditions only: little wind, flat seas and no swell. The southern side faces south straight into Bass Strait and is best with north-westerly to north-easterly offshore winds; any south-westerly swell breaks across the shelf and the beach is dominated by strong rips, with a double bar system and rips every 400 m on the inner bar. The Scuba Doctor rates it a highly hazardous area for experienced divers and snorkellers only.

Autumn and early winter give the most usable days; visibility 5-15 m when clean.

Enter from the shelf on a flat day, swim out through the sandy channels between the low limestone blocks at 2-4 m, work east along the reef toward the tip of the point at 5-9 m, exploring the nooks and crannies of the blocks, turn at half gas and return inside the reef line to the shelf, staying well clear of the rips on the open beach.

No regular commercial operator – dived independently by experienced Geelong and Surf Coast divers and clubs on the rare flat days; Bay City Scuba (Geelong) is the nearest shop. Snorkel tours operate under Parks Victoria licence in summer.